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What is the main content of the second volume of mathematics in senior one?
Chapter 1: Understanding Graphics (2);

Chapter two: abdication subtraction within 20;

Chapter three: classification and arrangement;

Chapter 4: Understanding numbers within 100;

Chapter 5: Understanding RMB;

Chapter 6: Addition and subtraction within 100 (1);

Chapter seven: discovering the law;

Chapter 8: Overview.

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